Illinois · Garden vegetables

Sweet Potato season in Illinois

Typically early September to mid-October, with peak mid-September through late September.

Hatched chalk = early and late shoulders; solid = peak.

Southern Illinois growers dig a little earlier and bigger.

At a glance

Early

From early September — first pickings, lighter supply, best prices come later.

Peak

mid-September through late September — full stalls, full flavor. This is the stretch to plan around.

Late

Through mid-October — quantity for preserving, and the stalls start dealing.

Season length

about 6 weeks end to end, shoulders included.

Sweet potatoes

Look: Even, deep-colored skin free of gouges, sunken spots or dark shoulder bruises.
Feel: Hard and heavy for its size from tip to tip — soft ends are the first sign of spoilage.
Smell: A sound root barely smells at all; any fermented or moldy whiff means trouble inside.
Tip: Ask if they have been cured — freshly dug roots need a week or two of warm curing before the sweetness really shows up.
Keeps: Cool, dark pantry, never the fridge; cured roots keep a month or more.

Chasing the season?

Sweet Potato peak moves across the map. After this window, it lands next in:

The whole national sweep · everything in season in Illinois

Frequently asked questions

When is sweet potato season in Illinois?

In Illinois, the sweet potato season typically runs early September to mid-October, with peak availability mid-September through late September. Exact weeks shift a little with each year's weather.

Can I pick my own sweet potatoes in Illinois?

Not a u-pick crop — buy cured roots at fall farm stands, festivals and markets. The best market weeks are mid-September through late September.

How long does sweet potato season last in Illinois?

about 6 weeks end to end — early September to mid-October. The early and late shoulders are real but lighter; the solid stretch of chalk on the band is the sure bet.